{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1026-1HB40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1026-1HB40","canonicalUrl":"https://aoctrl.com/siemens/3RT1026-1HB40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1026-1HB40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, 3RT1026-1HB40, S0 frame, 24 V DC coil, 11 kW at 400 V AC-2, 45 mm width, screw terminals, IP20 front.","salesMarkdown":"The Siemens SIRIUS 3RT1026-1HB40 is a S0-frame power contactor rated for motor switching in industrial control panels. Its 24 V DC coil draws 4.2 W during both closing and holding, so the coil supply can be a standard 24 V DC power supply without oversizing for inrush. The main contacts are screw-type terminals sized for 2x (0.75... 4 mm²) solid or 2x 10 mm² stranded, which covers most motor leads up to 11 kW. At 400 V, the AC-2 rating is 11 kW — that is the duty for slip-ring motors or moderate starting. For reversing or plugging duty (AC-4), the same contactor handles 15.5 A at 400 V. The AC-12 maximum operating current is 10 A, which covers resistive loads like heater banks. Type 2 coordination requires a 35 A gL/gG fuse upstream; Type 1 allows a 100 A fuse, giving flexibility in panel design. Front protection is IP20; the terminals themselves are IP00, meaning the panel enclosure provides the environmental seal. Maximum operating altitude is 2000 m, so it is fine for most plant-floor installations without derating. Mechanical endurance is 10 million operations — a fast mover for high-cycle applications like conveyor lines. ## Auxiliary contacts and wiring The contactor carries no instantaneous auxiliary contact as standard (0 auxiliary contacts), so if you need feedback or interlocking, order a separate auxiliary contact block. The auxiliary contact ratings are: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V, 6 A at 230 V, and 3 A at 400 V — all at the rated value. Wire sizes for the main circuit accept 2x (16... 12) AWG solid or 1x 8 AWG stranded.","metaTitle":"Siemens SIRIUS 3RT1026-1HB40 Power Contactor, 24 V DC Coil,","metaDescription":"Siemens SIRIUS 3RT1026-1HB40 power contactor, S0 frame, 24 V DC coil, 11 kW at 400 V AC-2, 45 mm wide, IP20 front, screw terminals. Active production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"101 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)","Width":"45 mm","Height":"85 mm","Maximum":"2 000 m","At The Side":"6 mm","Rated Value":"24 V","On The Front":"IP20","Initial Value":"0.7","Mounting type":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022","Of The Terminal":"IP00","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Full-scale value":"1.25","Size of contactor":"S0","Product brand name":"SIRIUS","Degree of pollution":"3","Product designation":"power contactor","at 24 V rated value":"10 A","at 60 V rated value":"2 A","Of Contactor Typical":"10 000 000","at 110 V rated value":"1 A","at 220 V rated value":"0.3 A","at 230 V rated value":"6 A","at 400 V rated value":"3 A","at 500 V rated value":"11 kW","at 690 V rated value":"11 kW","Instantaneous Contact":"0","Side-by-side mounting":"Yes","For Main Current Circuit":"screw-type terminals","Single Or Multi-Stranded":"2x (1 ... 2,5 mm²), 2x (2,5 ... 6 mm²), max. 2x 10 mm²","at AC-2 at 400 V rated value":"11 kW","at AC-4 at 400 V rated value":"15.5 A","Closing power of magnet coil at DC":"4.2 W","Holding power of magnet coil at DC":"4.2 W","Operating current at AC-12 maximum":"10 A","With Type Of Assignment 2 Required":"fuse gL/gG: 35 A","at AWG conductors for main contacts":"2x (16 ... 12), 2x (14 ... 10), 1x 8","With Type Of Coordination 1 Required":"fuse gL/gG: 100 A","Reference code acc. to DIN EN 81346-2":"Q","Number of NC contacts for main contacts":"0","Number of NO contacts for main contacts":"3","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Number of poles for main current circuit":"3","at AWG conductors for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","Contact reliability of auxiliary contacts":"1 faulty switching per 100 million (17 V, 1 mA)","For Auxiliary And Control Current Circuit":"screw-type terminals","at ambient temperature 40 °C rated value":"40 A","Type of voltage of the control supply voltage":"DC","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=409942&mlfb=3RT1026-1HB40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1026-1HB40/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for motor switching?","answer":"At 400 V AC-2 duty, it is rated 11 kW. For AC-4 reversing duty at 400 V, the current rating is 15.5 A. The AC-12 resistive load maximum is 10 A."},{"question":"What is the physical size and how does it mount?","answer":"The S0 frame is 45 mm wide, 85 mm tall, and 101 mm deep. It snaps onto 35 mm DIN rail per EN 50022, and side-by-side mounting is allowed with 6 mm side clearance."},{"question":"What wire sizes does the main circuit accept?","answer":"Solid conductors: 2x (0.5... 1.5 mm²), 2x (0.75... 2.5 mm²), max 2x (0.75... 4 mm²). Stranded: 2x (1... 2.5 mm²), 2x (2.5... 6 mm²), max 2x 10 mm². AWG equivalents: 2x (16... 12) solid, 1x 8 stranded."},{"question":"Does the 3RT1026-1HB40 include auxiliary contacts?","answer":"No. It has zero instantaneous auxiliary contacts as standard. An auxiliary contact block must be ordered separately if needed for status feedback or interlocking."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1026-1HB40","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/3RT1026-1HB40 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}